Mold for building blocks



Feb. 26, 1935. w, FEL 1,992,302

I MOLD FOR BUILDING BLOCKS Filed April 3, 1951 Patented Feb. 26, 1935 UNITED --STATES, PATENT OFFICE 1 m l 1,992,soz o i p MoLp FOR-BUILDING nooKs Walter TheodoreFels, Jamaica, N. Y. 7 I n. Application Asia I3, 193;, Serial No. 527,516

3 Claims. 1 (Cl. -121) My invention relates to-improvements in molding apparatus and methods of using the same,- with special reference to the manufacture of the novel building blocks disclosed in my co-pending application, Serial No. 527,515, filed, "April 3, 193l,although it is to be understoodthatthe invention is susceptible of other uses. 1

Briefly stated, the invention has for one of its primary objects to provide a molding apparatus which is especially adapted for the production of building blocks'from plastic material, the nature of: the apparatus and-its method of use being such that blocks 'mayxbe formed of one or more layers of distinctive material bound into a unitary massyor which'may be employed inthe production of blocks comprising separate sections of, the, same or different-material, which sections will be"spac'edly"connected byrods, or equivalent means for the purpose of providing an air space therebetween; so that the: blocks may provide both the exterior and interior wallsof a building and a 'dead air space therebetween without the necessity of furring out." i l l i As a-further and more specific 'object,'the inventioncontemplates a molding apparatus and: method of use, whereby a; three section: blockmay be'produced for forming sound-proof in: terior partitions, the intermediate sections of the blocksbeing adapted to form the partition wall, and the outer sections which are spacedly connected thereto, enabling the blocks to provide (without furring or lathing) the plastered roomwall surfaces, with a dead air space intervening between eachand the intermediate partition wall. N i

A' still further object of the invention isto provide a molding apparatus which is very simple in construction, strong and durable, and whereby completed building block or-the like may be expeditiously produced without the exercise of any particular skill byithe operator. r

Still another object of the invention is to .furnish in a molding apparatus novel means for aligning and supportingone mold section with respect to another section l I The invention also resides in certain novel features of construction, combination and arrangementof the various parts of the apparatus, -and in, certain novel methods of use,all of which will be readily apparent to those skilled in the art upon reference to the accompanying drawing in connection with the detailed description thereof, appearing hereinafter. 7

It'is to be understood that thedrawing, as required by the patent statutes, illustrates what is now regarded as a preferred form of the molding apparatus. 1 However, it will be appreciated that the invention is susceptible of other mechanical expressions, and modes of use, within the spirit and scope of the subject matter claimedhereinafter. '1 1 In the drawing, i Figure 1 is a side elevational view of a molding apparatus comprising independent sections,one of which provides guiding and supporting means fortheothery a .1, J a

Figure 2 is a longitudinal sectional view through the apparatus of Figure 1; Figure .3 is an end elevational view of the mold assembly shown inFigure l, and Figure; is a cross-sectional ,view through the assembled mold sections of Figure 1 and a pair of opposite pi'n-carryingguide' members which are'associated with one of the sections. 1

Figures 1, 2, 3 and 4 illustrate a molding apparatus whichcomprehends separate molds 20, 26,-and which is especially designed for the production of the novel multiplewall-providing block disclosed in my co-pending application mentioned hereinbefore. I

The mold 20 comprises L-shaped sections 21, 21* and 22, 22 with theend wall 21 of one section hingedly connected,'as at 25,to'the side wall 22 of the other section. A plate 24 suitably secured to the outer surface of wall, 21 provides the :leaf 24hingedly"connected thereto as at'24 and adapted tooverlie the outer surface of end wall 22 ,--which latter has a headed pin 24 'adapted to project'through a hole in leaf 24 to beengaged by the pivoted hook 24 of said leaf. Thus, the sections of the mold 20 may be readily secured in closedposition. l i

'In order-that the mold may produce a block having a continuous depression extending entirely around it,-in a single plane, I bevel the innersurface of the sections 21and 2 1, 22 and 22 from the intermediate points23 and 29 toward their outer edges as indicated in Figs. 2 and 4. Thus the ,,cross section of the sections 21, 21? and 22, 22 gradually decreases in the direction of the outer edges, and the block formed by each pair of sections-as will be obvious,-will have a, continuous depression thereabout in a single plane,

The mold 26 likewise comprises hingedly connected L-shaped sections, -these being designated as at 2'72'7 and 28, 28 -The adjacent portions of .the side wall 28 and end ,wall 27 -are hingedly connected as :at 31, whileside wall 27 and end wall 28 carry the latchingstructure 30;

30 30, 30, 30 corresponding to the similar structure 24, 24 24 24, 24 of mold 20. Ridge 29 corresponds to ridge 23 of mold 20.

It is to be observed that the outer surfaces of the end walls 27*, 28 of the mold 26 areprovided with guide strips 32 which are pivotally held in flat contact therewith by means of headed pins or screws 33 as shown. Two pairs of laterally spaced, opposed guide and supporting strips 34 are similarly pivoted, as at 35 to the outer surfaces of side walls 27, 28. The supporting guide strips 34 of each pair have a lineal series of aligned holes 34 for selectively receiving the rods 36 which, as shown, are adapted to support mold 20 in variably spaced superposed alignment with mold 26.

It will be evident that the dimensions of the molds20, 26, are the same,and that the strips 32, 34 may be readily turned to perpendicular position to accurately center or align the two molds. In this connection, it is desired to emphasize the fact that the end guide strips 32, through their engagement with the ends 21*, 22* of mold 20 preventswinging of the supporting strips 34 under the weight of the mold 20 to diminish the space between molds 20, 26.

In carrying out the invention with the molds 20, 26for the production of a multiple section block with air spaces between the sections,the mold 20 is filled with the aggregate or mortar. While the plastic material is still soft, headed ends 38 of tie rods 38 are embedded therein as indicated by the dotted line showing in Figure 4.

When the material in mold 20 is sufficiently hard to admit of its being moved, the mold 26 is filled in the usualway and troweled smooth at the top. The strips 32, 34 are swungup to their vertical positions as shown in Figures 1-4 and rods 36 inserted through predetermined opposed ones of the holes 34 of the combined supporting and guide strips 34. This having been done, the mold 20 withthe hardened, or partially hardened block therein, is inverted and positioned upon the supporting rods 36 between the upwardly projecting ends of the opposed end and side strips 32, 34, respectively. The juxtapositioning of mold 20 abovemold 26 causes the outer headed ends 38 of the tie rods 38 to be embedded in the soft material of the embryo block of the mold 26.

The assembly will be allowed to stand until. the block in the mold 26 has become sufficiently hardened to admit of removal of the mold, whereupon both molds, 20, 26, are removed releasing a block comprising two. sections rigidly connected by the headed tie rods 38' to provide an otherwise un-.

' broken air space therebetween. Each section of this latter block will have an endless groove about its edges for the reception of mortar.

When a two section block is desired for the production of an outer building wall and an interior plaster-finished wall, the block section formed by mold 20 will have for its outer sur-' face a layer of white or other interior plaster, with a subjacent rough coat, plaster layer carried by a cementinous mixture in which will be embedded the headed ends 38 of tie rods 33' The dead air space 37'between the inner and outer block sections prevents moisture from sweating through and dampening the interior plaster-finished wall surface, which is provided by the other sections of the blocks.

Q Obviously, the outer surfaces of either or both of the block sections made in molds 20, 26 may be made of layers of waterproofed material, or material of different colors or of other ornamental characteristics.

When a three section block is to be made, it is a simple matter, preparatory to pouring material into mold 26, to dispose additional tie rods 38 so that their headed ends will project perpendicularly into the mold 26 from its supporting surface below, and to about the extent that the rods 38 of Figure 9 extend thereunto.

After the block section in mold 26 has hardened, rods 36 are withdrawn, and the mold 20 is removed and laid upon a fiat surface, whereupon it is filled with suitable material. Then the two part block with mold 26 still in place is lifted up and members 32, 34 turned vertically downward. Rods 36 are now inserted in appropriate holes 34 of the guide and supporting members 34, and the block lowered until the rods rest upon the sides of mold 20 which lies within the confines of guide members 32, 34. The headed ends of the downwardly projecting tie members,(whose opposite ends have been previously embedded in the block of mold 26) ,will now be embedded in the soft material of the new block section in mold 20.

After the second formed block of mold 20 has hardened, both molds will be removed leaving a three section block, having an air space between each section. Such a block, as previously stated, is adapted for the construction of a triple wall for interior partitions, or for a main intermediate building wall with an outer stucco-like wall and an interior plaster-finished wall, and for other purposes.

In practice the blocks may be either preformed or formed on the job, and the continuous cavity about the blocks, when theblocks are placed with the cavities registering, receiving suitable reinforcing rods and binding material, such as cement and the like, to form a substantially monolithic wall which may have one or more dead air spaces. The construction of the wall itself is shown in my copending application.

It is believed that the operation and advantages of my invention will be apparent from the foregoing, as well as its construction, but it is emphasized that the scope of the invention should be determined only by reference to the claims appended hereto. Two molds 20 may be used in making a three section block. I

Having described my invention what I claim as new and desire to secure by Letters Patent is: V 1. A mold comprising a frame-like body, and opposed pairs of guide members pivoted to opposite exterior sides of said body and movable in planes parallel to such sides to selectively project beyond each edge thereof, opposed ones of said guidemembers having a lineal series of aligned seats and cross rods selectively positionable in corresponding ones of said seats anciengageable with the wall edges of another mold for alignedly supporting the molds in a predetermined spaced relationship.

2. A mold comprising a frame-like body, opposed pairs of guide members pivoted to opposite exterior sides of said body and movable in planes parallel to such sides to selectively project beyond each edge thereof, opposed ones of said guide members having a lineal series of aligned seats, cross rods selectively positionable in correspondingones of said seats and engageable with the wall edges of another mold for alignedly supporting the molds in a predetermined spaced relationship, and additional guide members pivoted to the end walls of said first mentioned mold and swingable in planes parallel thereto.

3. A mold comprising a frame-like body, opposed pairs of guide members adjustably carried 5 by opposite exterior sides of said body and movable thereon to selectively project beyond each edge thereof and to lie in fiat contact with the body when not in use, opposed ones of said guide members having a lineal series of aligned seats and cross rods selectively positionable in corresponding ones of said seats and engageable with the wall edges of another mold for alignedly supporting the molds in a predetermined spaced relationship.

WALTER THEODORE EELS. 

